All-in-one lock control board applied to intelligent cabinet

Abstract

The utility model discloses an all-in-one lock control board applied to an intelligent cabinet, which relates to the field of intelligent cabinets and comprises a main control module, a communication module, a power supply module, an electronic lock control module, an input / output interface module and an expansion module, the main control module is in communication connection with the intelligent cabinet host or slave through the communication module; the overvoltage protection module is in communication connection with the power supply module through the communication module and sends an overvoltage protection threshold signal to the power supply module; the power supply module supplies power to the main control module; the electronic lock state of each channel is detected through the electronic lock control module and is sent to the intelligent cabinet host; the electronic lock control module receives control signals of the intelligent cabinet host and controls opening and closing of the electronic locks of the channels through the electronic lock control module. And external equipment is connected through the expansion module and the expansion module. And the electronic lock control module is electrically connected with the electronic lock of the corresponding channel through the input / output interface module. According to the utility model, the universality of the lock control board is improved, and the maintenance cost and the time cost caused by non-universality of the lock control board are reduced.

Description

Technical Field

[0001] This utility model relates to the field of smart cabinet technology, and more specifically to a multi-functional lock control board for smart cabinets. Background Technology

[0002] With the continuous development of express delivery, food delivery and new retail businesses, smart lockers with compartments such as express delivery lockers, vending machines, food delivery lockers and bookshelves are becoming increasingly common.

[0003] However, most smart lockers on the market currently use dedicated lock control boards to control each compartment at a specific point. These boards are only compatible with certain locker models. Smart lockers in operation require after-sales maintenance and support services. Whether handled by in-house or outsourced repair teams, spare parts are limited due to cost considerations. When a specific lock control board is unavailable, the lack of versatility of existing boards hinders timely repairs, impacting the operational efficiency of the smart locker. Furthermore, when customer needs change—such as adjusting the number of compartments, the wiring method of the electronic locks, or expanding other functions—existing lock control boards lack versatility and scalability, often requiring the scrapping of existing parts and a complete redesign of the smart locker and lock control board.

[0004] Therefore, improving the versatility of lock control boards is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a multi-functional lock control board for use in smart cabinets to solve the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model discloses a multi-in-one lock control board for smart cabinets, including: a main control module, and a communication module, a power supply module, an electronic lock control module, an input / output interface module, and an expansion module connected to the main control module;

[0008] The main control module is connected to the smart cabinet host or slave unit through the communication module;

[0009] The main control module communicates with the power supply module through the communication module and sends an overvoltage protection threshold signal to the power supply module; the power supply module supplies power to the main control module.

[0010] The electronic lock control module is electrically connected to the electronic lock of the corresponding channel through the input / output interface module; the main control module detects the status of the electronic lock of each channel through the electronic lock control module and sends the data to the smart cabinet host; it receives the control signals from the smart cabinet host and controls the opening and closing of the electronic lock of each channel through the electronic lock control module.

[0011] The main control module is communicatively connected to the expansion module, and external devices are connected through the expansion module.

[0012] Furthermore, the communication module includes: a UDP network communication unit, an RS232 communication unit, two RS485 communication units, a communication protocol switching circuit, an address dial switch circuit, and a power supply and communication interface electrically connected to the RS232 communication unit and the two RS485 communication units, respectively connected to the main control module.

[0013] The UDP network communication unit is equipped with several RJ45 interfaces, which communicate with the smart cabinet host or slave unit through network lines.

[0014] The RS232 communication unit is used for communication between the main control module and the intelligent cabinet host.

[0015] Of the two RS485 communication units, one RS485 communication unit is controlled by the main control module and is used for communication between the main control module and the intelligent cabinet host, as well as for the main control module to send the overvoltage protection threshold signal; the other RS485 communication unit performs automatic data transmission and reception and is used for communication between the intelligent host and the slave lock control board.

[0016] The communication protocol switching circuit has several pins. By inserting and removing jumper caps on different pins, high and low level combinations are sent to the main control module. The main control module identifies the communication protocol based on the high and low level combinations.

[0017] The address DIP switch circuit is equipped with several DIP switches. By switching the high and low level combinations through the DIP switches, the binary address code is input into the main control module.

[0018] Furthermore, the power supply module includes an overvoltage and reverse connection protection circuit and a voltage regulation power supply circuit. The input terminal of the overvoltage and reverse connection protection circuit is connected to the output terminal of the voltage regulation power supply circuit, and the output terminal of the overvoltage and reverse connection protection circuit is electrically connected to the main control module to supply power to the main control module. The power supply is cut off when the voltage regulation power supply circuit is reverse connected or the voltage exceeds the overvoltage protection threshold.

[0019] Furthermore, the electronic lock control module includes a GPIO port extended input / multi-channel lock control status input circuit, a GPIO port extended output circuit, an electronic lock main power supply control circuit, and several single-channel electronic lock control circuits;

[0020] Each detection channel of the GPIO port extended input / multi-channel lock status input circuit is connected to the corresponding port of the input / output interface module; four cascaded 8-bit serial input shift registers are used to scan the locking status signal of the electronic lock corresponding to each channel and send the serial signal to the main control module;

[0021] The input terminal of the GPIO port expansion output circuit is connected to the signal of the main control module, and the output terminal of each channel is electrically connected to the control terminal of the corresponding single-channel electronic lock control circuit. The GPIO port expansion output circuit uses four cascaded 8-bit parallel output shift buffers. The serial control signal of the main control module is shifted and buffered by the GPIO port expansion output circuit and then output in parallel to each single-channel electronic lock control circuit.

[0022] The control terminal of the main power supply control circuit for the electronic lock is electrically connected to the main control module, the input terminal is electrically connected to the output terminal of the power supply module, and the output terminal is electrically connected to the input terminal of all the individual electronic lock control circuits; it supplies or de-energizes all the individual electronic lock control circuits according to the control signal of the main control module.

[0023] The output terminal of the single-channel electronic lock control circuit is electrically connected to the interface corresponding to the input / output interface module. It uses the power supply of the electronic lock's total power supply control circuit and outputs control current to the corresponding electronic lock according to the control signal of the GPIO port expansion output circuit to control the closing action of the electronic lock.

[0024] Furthermore, the electronic lock control module also includes an auxiliary power supply output control circuit, which provides detection voltage to each detection channel of the GPIO port extended input / multi-channel lock status input circuit according to the control command of the main control module.

[0025] Furthermore, the input / output interface module includes an input / output interface and an output overcurrent and input overvoltage detection circuit; the output overcurrent and input overvoltage detection circuit detects the voltage signal of the input interface and sends it to the main control module, and detects the current signal of the output interface and sends it to the main control module; the main control module controls the power supply of the electronic lock control module according to the voltage signal and the current signal.

[0026] Furthermore, the expansion module includes an I2C expansion unit or an SPI expansion unit, which communicates with external devices via an I2C bus or an SPI serial bus.

[0027] Furthermore, the expansion module also includes an auxiliary power supply output control circuit. The control signal input terminal of the auxiliary power supply output control circuit is connected to the main control module, and the output terminal is connected to the corresponding port of the input / output interface module. According to the control command of the main control module, it supplies power to the extended external device.

[0028] Furthermore, it also includes a light box control circuit, which provides independent power to the smart cabinet light box according to the control signal from the main control module.

[0029] Furthermore, it also includes a temperature and humidity detection module, which detects the temperature and humidity of the environment inside and outside the smart cabinet, and uses single-bus communication to send the temperature and humidity signals of the environment inside / outside the smart cabinet to the main control module, and then the communication module sends them to the smart cabinet host.

[0030] Furthermore, it also includes a buzzer notification module, which emits a notification sound based on the audio signal from the main control module.

[0031] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a multi-functional lock control board for smart cabinets. The power supply module is equipped with overvoltage and reverse connection protection circuits to protect the lock control board and other equipment from damage. When a short circuit fault occurs in a single electronic lock control circuit, an abnormal signal can be emitted through current detection, and the power supply to the main electronic lock control circuit will be cut off, effectively preventing the electronic lock from being powered on for a long time, burning out the electronic lock and causing the cabinet door to jam and become unopenable, thus ensuring the safe operation of the lock control board and other equipment. It is also equipped with output overcurrent and input overvoltage detection circuits to ensure that the current and voltage of each control and detection interface are normal, and to cut off the power to protect the lock control board and electronic lock control module in case of misconnection or short circuit. This utility model can communicate and connect with different types of smart cabinet host or slave through multiple communication methods and protocol switching circuits, effectively expanding the slave and adapting to various cabinet types, thus improving the versatility of the lock control board. Furthermore, the input and output interface module is equipped with various specifications of electronic lock plug interfaces, light box plug interfaces, and expansion modules, which can effectively adapt to different types of smart cabinets and external expansion devices. This invention improves the versatility of the lock control board, reducing maintenance and time costs caused by the lack of versatility in the lock control board. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 A schematic diagram of the overall structure of this utility model.

[0034] Figure 2 A schematic diagram of the overvoltage and reverse connection protection circuit provided by this utility model.

[0035] Figure 3 A schematic diagram of the voltage stabilization power supply circuit provided by this utility model.

[0036] Figure 4 A schematic diagram of the MCU main control circuit provided by this utility model.

[0037] Figure 5 A schematic diagram of the communication protocol switching circuit provided by this utility model.

[0038] Figure 6 A schematic diagram of the address dial switch circuit provided by this utility model.

[0039] Figure 7 A schematic diagram of the shift register circuit provided by this utility model.

[0040] Figure 8 A schematic diagram of the shift buffer circuit provided by this utility model.

[0041] Figure 9 A schematic diagram of the main power supply control circuit for the electronic lock provided by this utility model.

[0042] Figure 10 A schematic diagram of the single-channel electronic lock control circuit provided by this utility model.

[0043] Figure 11 A schematic diagram of the auxiliary power supply output control circuit provided by this utility model.

[0044] Figure 12 A schematic diagram of the UDP network communication unit circuit provided by this utility model.

[0045] Figure 13 A schematic diagram of the RS232 communication unit circuit provided by this utility model.

[0046] Figure 14 A schematic diagram of a single RS485 communication unit circuit provided by this utility model.

[0047] Figure 15 A schematic diagram of the RS485 communication unit circuit for automatic transceiver provided by this utility model.

[0048] Figure 16 A schematic diagram of the I2C expansion unit circuit provided by this utility model.

[0049] Figure 17A schematic diagram of the SPI expansion unit circuit provided by this utility model.

[0050] Figure 18 A schematic diagram of the output overcurrent and input overvoltage detection circuit provided by this utility model.

[0051] Figure 19 A schematic diagram of the temperature and humidity detection module provided by this utility model.

[0052] Figure 20 A schematic diagram of the buzzer notification module provided by this utility model. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0054] This utility model embodiment discloses a multi-in-one lock control board for smart cabinets, including: a main control module, and a communication module, a power supply module, an electronic lock control module, an input / output interface module, and an expansion module connected to the main control module;

[0055] The main control module communicates with the smart cabinet host or slave unit via the communication module;

[0056] The main control module communicates with the power supply module via the communication module and sends overvoltage protection threshold signals to the power supply module; the power supply module supplies power to the main control module.

[0057] The electronic lock control module is electrically connected to the electronic lock of the corresponding channel through the input / output interface module; the main control module detects the status of the electronic lock of each channel through the electronic lock control module and sends it to the smart cabinet host; it receives the control signals from the smart cabinet host and controls the opening and closing of the electronic lock of each channel through the electronic lock control module.

[0058] The main control module communicates with the expansion module, and external devices are connected through the expansion module.

[0059] The main control module uses an MCU main control circuit, such as Figure 4 As shown.

[0060] In a specific embodiment, such as Figure 1 As shown, the communication module includes: UDP network communication units (such as...) connected to the main control module. Figure 12 As shown), RS232 communication unit (such as Figure 13As shown), two RS485 communication units (such as...) Figure 14 , 15 (as shown), communication protocol switching circuit, address DIP switch circuit, and power supply and communication interface electrically connected to RS232 communication unit and two RS485 communication units;

[0061] The UDP network communication unit is equipped with several RJ45 interfaces, which communicate with the smart cabinet host or slave unit through network lines;

[0062] The RS232 communication unit is used for communication between the main control module and the intelligent cabinet host.

[0063] Of the two RS485 communication units, one RS485 communication unit (such as...) Figure 14 (As shown) is controlled by the main control module, used for communication between the main control module and the intelligent cabinet host, and for the main control module to send overvoltage protection threshold signals; another RS485 communication unit (such as...) Figure 15 As shown), it performs automatic data transmission and reception, and is used for communication between the intelligent host and the slave lock control board;

[0064] The communication protocol switching circuit has several pins. By inserting and removing jumper caps to change different pins, high and low level combinations are sent to the main control module. The main control module identifies the communication protocol based on the high and low level combinations. The specific circuit diagram is shown below. Figure 5 As shown;

[0065] The address DIP switch circuit has several DIP switches. These switches switch high and low level combinations to input the binary address code into the main control module. The specific circuit diagram is shown below. Figure 6 As shown.

[0066] Specifically, by setting up communication units with multiple different communication protocols and switching the communication mode of the lock control board through a communication protocol switching circuit, and by setting the communication address of the lock control board through an address DIP switch circuit, the lock control board can adapt to the communication needs of different types of smart cabinets. It can also realize the communication expansion between the smart cabinet host and slave through UDP network communication unit and RS485 communication unit, improve the scalability of the smart cabinet, and thus comprehensively improve the versatility of the lock control board.

[0067] In a specific embodiment, such as Figure 1 , 2 As shown in Figure 3, the power supply module includes an overvoltage and reverse connection protection circuit and a voltage regulation power supply circuit. The input terminal of the overvoltage and reverse connection protection circuit is connected to the output terminal of the voltage regulation power supply circuit. The output terminal of the overvoltage and reverse connection protection circuit is electrically connected to the main control module to supply power to the main control module. The power supply is cut off when the voltage regulation power supply circuit is reverse connected or the voltage exceeds the overvoltage protection threshold.

[0068] Specifically, the overvoltage and reverse connection protection circuit uses a PMOS transistor as a switch. When the power supply polarity is correct, the MOS transistor is in the conducting state, allowing current to flow normally. When the power supply polarity is reversed, the MOS transistor is in the cutoff state, preventing current from flowing, thus achieving reverse connection protection. When the voltage exceeds the threshold of RV1, the internal resistance of RV1 drops sharply, causing the current through the resettable fuse F28 to increase continuously, temporarily blowing the fuse and protecting the downstream circuit.

[0069] The voltage regulator circuit adopts switching power supply technology, which controls the conversion and storage of electrical energy through fast switching. It uses components such as inductors, capacitors and diodes to achieve voltage step-down conversion, with an input voltage range of 4.5V-28V.

[0070] In a specific embodiment, such as Figure 1 As shown, the electronic lock control module includes a GPIO port expansion input / multi-channel lock control status input circuit, a GPIO port expansion output circuit, an electronic lock main power supply control circuit, and several single-channel electronic lock control circuits;

[0071] The GPIO port expands the input / multiplexed latching status input circuit's detection channels, connecting them to the corresponding ports of the input / output interface module; four cascaded 8-bit serial input shift registers are used (e.g., Figure 7 (As shown), scan the locking status signal of the electronic lock corresponding to each channel and send the serial signal to the main control module;

[0072] The input terminals of the GPIO port expansion output circuit are connected to the signals of the main control module, and the output terminals of each channel are electrically connected to the control terminals of the corresponding single-channel electronic lock control circuit; the GPIO port expansion output circuit uses four cascaded 8-bit parallel output shift registers (e.g., Figure 8 As shown), the serial control signal of the main control module is shifted and buffered through the GPIO port expansion output circuit and then output in parallel to each single-channel electronic lock control circuit.

[0073] Electronic lock main power supply control circuit (such as Figure 9 The control terminal (as shown) is electrically connected to the main control module, the input terminal is electrically connected to the output terminal of the power supply module, and the output terminal is electrically connected to the input terminal of all single-channel electronic lock control circuits; it supplies or de-energizes all single-channel electronic lock control circuits according to the control signal of the main control module.

[0074] Single-channel electronic lock control circuit (such as) Figure 10 The output terminal (as shown) is electrically connected to the corresponding interface of the input / output interface module. It is powered by the main power supply control circuit of the electronic lock and outputs control current to the corresponding electronic lock according to the control signal of the GPIO port expansion output circuit, thereby controlling the closing action of the electronic lock.

[0075] The GPIO port extended input / multi-channel lock control status input circuit and the GPIO port extended output circuit detect and control the opening and closing status of each electronic lock in the smart cabinet through cascading and scanning. By cascading more shift registers or shift buffers, multi-channel electronic lock detection and control can be realized, meeting the detection and control needs of different electronic cabinets and improving versatility and scalability.

[0076] Based on the separate single-channel electronic lock control circuit, a total power supply control circuit for the electronic lock is set up. When there is a short circuit fault in the single-channel electronic lock control circuit and the self-resetting fuse also fails, it can effectively prevent the electronic lock from being powered on for a long time, which could burn out the electronic lock and cause the door to jam and become unable to be opened, or cause a fire due to long-term heat.

[0077] In a specific embodiment, such as Figure 1 As shown, the input / output interface module includes input / output interfaces, output overcurrent and input overvoltage detection circuits; the output overcurrent and input overvoltage detection circuits (such as...) Figure 18 As shown, the voltage signal of the input interface is detected and sent to the main control module, and the current signal of the output interface is detected and sent to the main control module. The main control module controls the power supply of the electronic lock control module according to the voltage signal and the current signal.

[0078] By setting up output overcurrent and input overvoltage detection circuits, when the current or voltage exceeds the set threshold or time, the voltage output of the main power supply control circuit and auxiliary power supply output control circuit of the electronic lock can be automatically cut off, thereby protecting the circuit body and downstream loads. The circuit will automatically recover when the voltage returns to normal or after the set time.

[0079] In one specific embodiment, the expansion module includes an I2C expansion unit (such as...) Figure 16 (as shown) or SPI expansion unit (such as Figure 17 As shown, it communicates with external devices via I2C bus or SPI serial bus; by setting up expansion modules, it can connect to external devices such as surveillance cameras, cooling fans, screens, barcode scanners, and card readers; it can also reserve expansion for 4G, LoRa, NB-IoT, Bluetooth and other wireless communication functions, and can form a network of screenless smart cabinets to improve the scalability of the smart cabinet.

[0080] In a specific embodiment, such as Figure 1 As shown, the expansion module also includes an auxiliary power supply output control circuit (such as...). Figure 11 As shown, the control signal input terminal of the auxiliary power supply output control circuit is connected to the main control module, and the output terminal is connected to the corresponding port of the input / output interface module. According to the control command of the main control module, it supplies power to the extended external devices.

[0081] In one specific embodiment, a light box control circuit is also included, which independently supplies power to the smart cabinet light box according to the control signal from the main control module.

[0082] Specifically, when the electronic lock operates, the current is relatively large. If the same power supply is used, the lights will flicker, affecting the user experience. By setting up an independent light box control circuit, the flickering can be avoided. Furthermore, the independent light box control circuit allows the smart cabinet to use DC light strips of different voltages, meeting the diverse needs of customers. Moreover, a malfunction in the light box will not affect the operation of the electronic lock.

[0083] In one specific embodiment, a temperature and humidity detection module (such as...) is also included. Figure 19 As shown, the temperature and humidity detection module detects the temperature and humidity of the environment inside and outside the smart cabinet, and uses single-bus communication to send the temperature and humidity signals of the environment inside / outside the smart cabinet to the main control module, and then the communication module sends them to the smart cabinet host, thereby meeting the temperature detection requirements of items that require specific temperature or humidity.

[0084] In one specific embodiment, a buzzer notification module (such as...) is also included. Figure 20 As shown, the buzzer prompt module emits a prompt sound based on the audio signal from the main control module.

[0085] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0086] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-in-one lock control board applied to an intelligent cabinet, characterized in that, The utility model relates to a kind of intelligent cabinet control system, including: main control module, and communication module, power supply module, electronic lock control module, input / output interface module, extension module connected with the main control module;The main control module is communicated with the host computer or slave of intelligent cabinet by the communication module;The main control module is communicated with the power supply module by the communication module, and sends overvoltage protection threshold signal to the power supply module;The power supply module is powered for the main control module;The electronic lock control module is electrically connected with the electronic lock of corresponding channel by the input / output interface module;The main control module detects the state of each channel electronic lock by the electronic lock control module, and sends to the host computer of intelligent cabinet;Receive the control signal of the host computer of intelligent cabinet, and the opening and closing of each channel electronic lock is controlled by the electronic lock control module;The main control module is communicated with the extension module, and the extension module is connected with external equipment. The communication module includes: a UDP network communication unit, an RS232 communication unit, a two-way RS485 communication unit, a communication protocol switching circuit, an address dialing switching circuit, and a power supply and a communication interface electrically connected with the RS232 communication unit and the two-way RS485 communication unit, which are connected with the main control module. The UDP network communication unit is provided with a plurality of RJ45 interfaces, and communicates with the host computer or slave of intelligent cabinet through network lines. The RS232 communication unit is used for communication between the main control module and the host computer of intelligent cabinet. In the two-way RS485 communication unit, one RS485 communication unit is controlled by the main control module and is used for communication between the main control module and the host computer of intelligent cabinet, and the main control module sends the overvoltage protection threshold signal; the other RS485 communication unit automatically transmits and receives data and is used for communication between the host computer and the slave lock control board. The communication protocol switching circuit is provided with a plurality of PIN pins, and sends high and low level combinations to the main control module by plugging different PIN pins with jumper caps; the main control module identifies the communication protocol according to the high and low level combinations.

2. The multi-in-one lock control board applied to the intelligent cabinet according to claim 1, characterized in that, The address dialing switching circuit is provided with a plurality of dialing switches, and inputs binary address codes into the main control module by switching high and low level combinations with dialing switches. The power supply module includes an overvoltage and anti-reverse connection circuit and a voltage stabilizing power supply circuit, the input end of the overvoltage and anti-reverse connection circuit is connected with the output end of the voltage stabilizing power supply circuit, the output end of the overvoltage and anti-reverse connection circuit is electrically connected with the main control module to supply power for the main control module, and the power supply is cut off when the voltage stabilizing power supply circuit is reversed or the voltage exceeds the overvoltage protection threshold. The electronic lock control module includes a GPIO port expansion input / multi-way lock control state input circuit, a GPIO port expansion output circuit, an electronic lock total power supply control circuit, and a plurality of single electronic lock control circuits. ​ ​ ​ 3. The multi-in-one lock control board applied to the intelligent cabinet according to claim 1, characterized in that, ​ 4. The multi-in-one lock control board applied to the intelligent cabinet according to claim 1, characterized in that, ​ The detection channel of the GPIO port expansion input / multi-path lock control state input circuit is connected with the port corresponding to the input / output interface module; four 8-bit serial input shift registers are cascaded to scan the locking state signals of the electronic locks corresponding to each channel, and serial signals are sent to the main control module; The input end of the GPIO port expansion output circuit is connected with the signal of the main control module, and the output end of each channel is connected with the control end of the corresponding single-path electronic lock control circuit; four 8-bit parallel output shift registers are cascaded in the GPIO port expansion output circuit, and the serial control signals of the main control module are shifted and buffered in the GPIO port expansion output circuit and then output to each single-path electronic lock control circuit in parallel; The control end of the electronic lock total power supply control circuit is connected with the main control module, the input end is connected with the output end of the power supply module, and the output end is connected with the input end of all single-path electronic lock control circuits; Power supply or power-off of all single-path electronic lock control circuits is controlled according to the control signals of the main control module; The output end of the single-path electronic lock control circuit is connected with the interface corresponding to the input / output interface module, and the electronic lock is controlled to be attracted according to the control current output to the corresponding electronic lock by the power supply of the electronic lock total power supply control circuit and the control signals of the GPIO port expansion output circuit.

5. The multi-in-one lock control board applied to the intelligent cabinet according to claim 1, characterized in that, The input / output interface module includes an input / output interface, an output overcurrent and input overvoltage detection circuit; the output overcurrent and input overvoltage detection circuit detects the voltage signal of the input interface and sends it to the main control module, detects the current signal of the output interface and sends it to the main control module, and the main control module controls the power supply of the electronic lock control module according to the voltage signal and the current signal.

6. The multi-in-one lock control panel applied to the intelligent cabinet according to claim 1, characterized in that, The expansion module includes an I2C expansion unit or an SPI expansion unit, which communicates with an expansion external device through an I2C bus or an SPI serial bus.

7. The multi-in-one lock control panel applied to the intelligent cabinet according to claim 6, characterized in that, The expansion module further includes an auxiliary power supply output control circuit, the control signal input end of the auxiliary power supply output control circuit is connected with the main control module, the output end is connected with the port corresponding to the input / output interface module, and the expansion external device is powered according to the control command of the main control module.

8. The multi-in-one lock control panel applied to the intelligent cabinet according to claim 1, characterized in that, A light box control circuit is further included, which independently supplies power to the smart cabinet light box according to the control signal of the main control module.

9. The multi-in-one lock control panel applied to the intelligent cabinet according to claim 1, characterized in that, A temperature and humidity detection module is further included, which detects the temperature and humidity of the environment inside and outside the smart cabinet, and sends the temperature and humidity signals of the environment inside and outside the smart cabinet to the main control module through single bus communication, and then sends them to the smart cabinet host through the communication module.

10. The multi-in-one lock control panel applied to the intelligent cabinet according to claim 1, characterized in that, A buzzer prompting module is further included, which emits a prompt sound according to the audio signal of the main control module.

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